Redundant interpolation prefix

Reports redundant dollar prefixes in string template expressions.

Such prefixes can be safely removed.

Example:

fun example() {
    $"Example: prefix of length one is always redundant"
    $$"Example: string contains no interpolated values"
    $$"Example: $$ dollars are plain characters here $$"
}

After the quick fixes are applied:

fun example() {
    "Example: prefix of length one is always redundant"
    "Example: string contains no interpolated values"
    "Example: $$ dollars are plain characters here $$"
}

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

RedundantInterpolationPrefix

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Kotlin | Redundant constructs

Inspection ID: RedundantInterpolationPrefix

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection RedundantInterpolationPrefix

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

IntelliJ IDEA 2025.3

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.3, Qodana for JVM 2025.3,

Last modified: 03 December 2025